There is no point in the movie that Jamie so much as hints he thinks what he is out is ok. In fact the bulk of the movie is spent showing us how much difficultly he has with the whole thing to the point of him actually calling the police right near the end but hanging up. He didn't do any of this just because he was told to. He was sexually abused and at the age where he needed a role model and someone who helped him feel safe. At first John did this for him and later showed his true colors. Jamie struggled with his loyalty to John and how wrong what they did was. Plus Jamie felt a lot of fear towards John in the end. John might have been acting like a vigilante to get some of his accomplices on board for what he did but he was just a killer like all other serial killers. He liked killing and pedo's only made up some of his victims. The movie was a little scattered at times but it did an excellent job of helping us understand Jamie and his motivations for doing what he did. Your critic shows very little understanding of human nature and a true question of whether you actually paid attention while watching the movie.